Selection

selection - an assortment of things from which a choice can be made; "the store carried a large selection of shoes"
3.
selection - the person or thing chosen or selected; "he was my pick for mayor" ...
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Selection occurs only when the individuals of a population are diverse in their characteristics--or more specifically when the traits of individuals differ with respect to how well they equip them to survive or exploit a particular pressure.
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In evolution, the selection of traits that aid an organism's competitive capability when the population is at or near its carrying capacity.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
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Natural selection operates to produce individuals that are better adapted to their environment. It is important to keep in mind as you read below that natural selection does not act on individuals; it acts on populations.
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natural selection
a process of differential fertility in which some genotypes, under a specific set of conditions, are more successful in producing progeny than others ...
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Selection acts on individuals, not their individual genes. Sexual reproduction increases variation by reshuffling the genetic information from parents into new combinations in their offspring. Mutations produce new alleles.
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Clonal selection leads to the eventual production of:
a pool of antibody-secreting plasma cells. Plasma cells are B-cells that have tooled up (e.g., forming a large endoplasmic reticulum) for massive synthesis and secretion of an antibody.
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Natural selection is the primary mechanism within the scientific theory of evolution, i.e. it alters the frequency of alleles within a population.
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Selection method for self-pollinating species in cross breeding. After making the initial cross the segregating progenies are propagated till F4 to F6 without selection.
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Selection of antibodies against recombinant proteins has been reduced to the microtitre format.
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Selection
Conditions where only mutant or recombinant cells with a particular phenotype grow and divide.
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selection
The process by which the forms of organisms in a population that are better adapted to the environmental conditions increase in frequency relative to less well-adapted forms over a number of generations.
selection coefficient ...
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Selection. A change in allele frequency over time in a population
Sequential hermaphrodite. An individual that sequentially produces male and then female gametes or vice versa
Sessile. Immobile because of an attachment to a substratum ...
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selection -- Process which favors one feature of organisms in a population over another feature found in the population.
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Selection is not a force in the sense that gravity or the strong nuclear force is. However, for the sake of brevity, biologists sometimes refer to it that way. This often leads to some confusion when biologists speak of selection "pressures.
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selection pressure The tendency for natural selection to occur; natural selection occurs whenever some genotypes are more fit than other genotypes.
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Selection: The use of particular conditions, such as the presence of ampicillin, to allow survival only of cells with a particular phenotype, such as production of beta-lactamase.
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: Selection involving opposing forces in which selective advantages and disadvantages cancel each other out.
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natural selection: the concept that random, small variations take place in living things that lead to the gradual development of a species.
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Natural Selection
8b/7d
Species diversity increases chances of survival ...
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Natural selection. The differential survival and reproduc- tion of organisms with genetic characteristics that enable them to better utilize environmental resources.
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A broad definition of genetic engineering also includes selective breeding and other means of artificial selection. Genetic linkage map. A linear map of the relative positions of genes along a chromosome.
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Hardy-Weinberg Law -- the concept that both gene frequencies and genotype frequencies will remain constant from generation to generation in an infinitely large, interbreeding population in which mating is at random and there is no selection, ...
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Selectable marker A gene which is usually constitutively expressed and allows the selection of cells which carry it through growth on a selective medium.
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That isn't sufficient time for natural selection to increase the frequency of a rare allele, such as is observed in the European populations. Furthermore, the selection pressures caused by HIV should be much higher in Africa than in Europe.
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Charles Darwin established evolution as a viable theory by articulating its driving force: natural selection. (Alfred Russell Wallace is commonly recognized as the co-discoverer of this concept).
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This ability to provide effectively irreversible inhibition explains the selection of the serpins to control the proteolytic cascades of higher organisms. The conformational mechanism provides another advantage in its potential to modulate activity.
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English walnut. The walnut species (Juglans regia) used for the selection of commercial scion cultivars; origin believed in Persia (= Persian walnut).
entomophagous nematodes. Nematodes that eat insects.
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Vectors are vehicles for cloning DNA. A vector provides essential sequences for replicating DNA in a host and selection antibiotic markers. Non-essential sequences are deleted to allow room for the cloning of foreign DNA.
Related ...
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A change in the frequency or amplitude of the applied radio signal leads to a change in the wavelength and intensity of the diffracted light. As the radio signal can be altered rapidly, the intensity and wavelength selection are rapidly altered ...
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At various times, aliquots were blended to interrupt mating and the bacteria plated on plates that select for strain A, against strain B (counterselection) and for selected markers present in B (eg. B1, B2...).
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